Class notes
BIO 101 chapter #1 Notes
- Course
- BIO 101
- Institution
- Northern Virginia Community College - Annandale
Organic notes from Bio lecture. Full chapter 1 notes reviewed and expanded for further understanding.
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What is life?Response to the environment-Reproduction-Growth and development -Energy processing-Regulation-Evolutionary adaption-Living creatures adapt their environment either being by camouflaging, developing abilities through evolution. Evolution shows different changes that this creatures make in order to survive.Themes that connect concepts of biology:To explain biological organizationEmergent properties(as you go up to the next level)If you have multiple properties per ex. Nails, wood, and paint the properties will change when you make a chair with them. §-Reductionism/ Hierarchy(zooming in into details)Combination of components that come together§-Systems biologyTo construct a model to explain. Successful models can also predict how change will affect (ex. Acid Rain)§-1.Reductionism/Hierarchy-The biosphere-Ecosystems-Communities -Populations-Organism-Organs & organ systems-Tissues-Cells-Organelles-Atoms-MoleculesEcosystemsPolar BearSeal ========> water/krillArtic FoxWolvesOrgan system: Respiratory system=> Lungs=>Tissue=>Collection of cells=>cell=>organellesNucleus of a cell contains DNAMolecule: DNA= Deoxyribonucleic AcidAtom: C, H, O, N, P.TaxonomyThe DIVERSE living forms into 3 domainsBacteria-Archaea (Extremophiles -live in very extreme conditions)-Eukaryotes-Domain -Kingdom -Phylum -Class -Order -Family -Genus -SpeciesDear King Phillip Came Over For Good SpaghettiTheory of Evolution seems to be the best explanation so far….Natural selection-Charles Darwin -ex. Finches in the Galapagos.Only best adapted creatures can survive and pass on genes to next generation. (The natural environment "Selects" for beneficial traits)○-Population with varied inherited traits. (Different colors, shapes, etc.)1.Elimination of individuals with certain traits2.Reproduction of survivors3.Increasing frequency of traits that enhance survival and reproductive success.4.How scientists studyInquiry -the 'search for info' and explanation are of main formsHypothesis & predictions -(you perform scientific experiments to check this)1.Both these leads to accumulation of data can be qualitative or quantitative.This has to be analyzed, reviewed-The expts. designed have to be carefully planned-Deciding sample size-Variables (independent, dependent, standardized)-Hypothesis based scienceWhat causes…? A tentative answer to a well framed question --an educated guess based on experiments and data. Deductive reasoning (if, then logic)-HypothesisMust be testable-Must be falsifiable (proved right or wrong)-Observations & questions -(theories arise from this)Theory -Describe, observeAll types of cellsProkaryoticArchaea○BacteriaX100 smaller than a Eukaryotic§Doesn't have a nucleus but instead a nucleoid region§○-Eukaryotic○Have a cell which has a nuclear membrane(with DNA inside)§Plantae§Animalia§Fungai§Protist -Always single celled able to be animal-like-
& plant-like. Ex. mildew (different from prokaryotic)Chapter 1 -The Scientific Study of LifeMonday, August 21, 20231:31 PM
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